PUBLIC REVIEW DRAFT, OCTOBER 2008KENYA STANDARD KS 1884-2:2008 
ICS 33.120.40 
© KEBS 2008 First Edition 2008  
 
 
  
 
  
 
Specification — Accessories for use in 
antenna installations —  
 
Part 2: Outlet boxes 
 
 
 
  
 
  
 
 
 
PUBLIC REVIEW DRAFT, OCTOBER 2008 
 
 
 
 
 
 PUBLIC REVIEW DRAFT, OCTOBER 2008KS 1884-2:2008  
ii © KEBS 2008 — All rights reserved TECHNICAL COMMITTEE REPRESENTATION 
 
The following organizations were r epresented on the Technical Committee: 
 
Widestream Communications Limited Kenya Broadcasting Corporation 
Meteorological Department 
Kenya Power & Lighting Company  
Telea (K) Limited 
SR Kenya Limited 
Department of Defence 
Kenya Police Force 
Communications Commission of Kenya Kenya Bureau of Standards — Secretariat 
 
  
 
   
REVISION OF KENYA STANDARDS 
 
In order to keep abreast of progress in industry, Ke nya standards shall be regularly reviewed. Suggestions 
for improvement to published standards, addressed to  the Managing Director, Kenya Bureau of Standards, 
are welcome. 
 
  
 
   
 
  
© Kenya Bureau of Standards, 2008 
 
Copyright. Users are reminded that by virtue of Section 25 of the C opyright Act, Cap. 12 of 2001  of  the Laws of Kenya, copyrig ht 
subsists in all Kenya Standards and except as provided under Section 26 of this Act,  no Kenya Standard produced by Kenya Bureau  of 
Standards may be reproduced, stored in a retrieval system in any form or transmitted by any means without prior permission in w riting 
from the Managing Director. 
 
   
 
  
 
   
 
  
 
 
 
 
  
 PUBLIC REVIEW DRAFT, OCTOBER 2008KENYA STANDARD KS 1884-2:2008 
ICS 33.120.40 
© KEBS 2008 — All rights reserved  iii  
 
 
  
 
 
 
Specification — Accessories for use in antenna installations —  
 
Part 2: Outlet boxes  
 
            
   
 
KENYA BUREAU OF STANDARDS (KEBS) 
 
Head  Office:  P.O. Box 54974, Nairobi-00200, Tel.: (+254  020) 605490, 69028000, 602350, Mobile: 0722202137/8, 0734600471/2; 
Fax: (+254 020)  604031 
E-Mail: info@kebs.org,  Web:http://www.kebs.org  
 
KEBS Coast Region 
P.O. Box 99376, Mombasa 80100 
Tel: (+254 041) 229563, 230939/40 
Fax: (+254 041) 229448 E-mail: kebs-msa@swiftmombasa.com KEBS Lake Region 
P.O. Box 2949, Kisumu 40100 
Tel: (+254 057) 23549,22396 
Fax: (+254 057) 21814 
E-mail: kebs-ksm@swiftkisumu.com KEBS North Rift Region 
P.O. Box 2138, Nakuru 20100 
Tel: (+254 051) 210553, 210555PUBLIC REVIEW DRAFT, OCTOBER 2008KS 1884-2:2008  
iv © KEBS 2008 — All rights reserved FOREWORD 
 
This Kenya standard wa s prepared by the Communication Equipment (04TC06) under the mandate of the 
Electrical Industry Standards Committee and is in ac cordance with the procedures of the Bureau, in 
compliance with annex 3 of the WTO/TBT agreement. 
 
  Normative and informative annexes  
 
A 'normative' annex is an integral part of a standard, whereas an 'inf ormative' annex is only for information 
and guidance.  
 
  
 
  
 
  Summary of development   
This Kenya Standard, having been prepared 
by the Communication 
Equipment Technical Committee was first 
approved by the 
National Standards 
Council in December 
2008  
 Amendments issued since publication 
Amd. No. Date Text affected 
   
   
   
   
   
 
 PUBLIC REVIEW DRAFT, OCTOBER 2008 
KENYA STANDARD KS 1884-2:2008  
© KEBS 2008 — All rights reserved  1   Specification — Accessories for use in antenna installations — Part 2: 
Outlet boxes 
 
 
1 Scope 
 This part of KS 1884 specifies the mechanical and electr ical requirements for outlet boxes for use indoors in 
antenna installations that cover the VHF/ UHF television and VHF sound broadcast bands. 
 
2 Normative references 
 The following referenced documents are indispensable fo r the application of this Kenya Standard. For dated 
references, only the edition cited applies. For undated references, the latest edition of the referenced 
document (including any amendments) applies. 
 
IEC 60169-2, Radio-frequency connectors — Part 2: Coaxial unmatched connector  
 
KS 1884-1, Accessories for use in antenna installations — Part 1: Splitters  
 
3 Definitions 
 
For the purposes of this part of KS 1884, the following definitions apply: 
 
3.1  
acceptable 
acceptable to the authority administering this st andard, or to the parties concluding the purchase 
contract, as relevant 
 3.2 
mutual isolation 
isolation between outputs 
 
3.3  
outlet box a unit for interconnecting a feeder and a receiver lead 
 3.4  through-loss 
the reduction in signal level between the input and the output, expressed in decibels 
 
4 Mechanical requirements 
 
4.1 Material 
 
Outlet boxes shall be fabricated from a material that is suitable for use in the environment in which the outlet 
box is intended to be used. 
 
4.2 Input terminal robustness 
 
NOTE This requirement applies only to outlet boxes where screw type terminals are provided for t he connection of the input cabl e. It 
does not apply where suitable terminal sockets are fitted. 
 
The input terminals shall be so desig ned that they will accommodate a 75 Ω coaxial cable (of the dimensions 
specified by the outlet box manufacturer) in such a way that the characteristic im pedance of the cable is not 
affected. When the outlet box is tested in accordance  with 7.2 of KS 1884-1, there shall be no sign of 
damage or deformation of the cable or terminals and the cable shall not have become dislodged. PUBLIC REVIEW DRAFT, OCTOBER 2008KS 1884-2:2008  
2 © KEBS 2008 — All rights reserved  
4.3 Outlet sockets 
 
Where the outlet box is intended for use with TV or VH F sound broadcast transmissions, the following outlet 
sockets shall be incorp orated as required: 
 
a) one male and one female outlet socket (where sound and television broadcast services are required); or 
 
b) one male or female outlet socket (whichever is app licable for the service required) that complies with the 
relevant requirements of IEC 60169-2 and is suitabl e for use in a system that has a nominal unbalanced 
characteristic impedance of 75 Ω. 
 
5 Electrical requirements 
 
5.1 Amplitude frequency response of outputs 
 
5.1.1 Outlet boxes in subscriber's tap systems 
 Outlet boxes may be designed as TV-FM filters without any significant insertion loss, or as splitters with a 
through-loss of 2 dB to 4 dB. 
 5.1.2 Outlet boxes in looped systems  
The manufacturer shall state the frequency response of the outputs, giving the through-loss, in decibels, at 
the extreme points of the specified frequency range. These values are the nominal values and the nominal 
line is the straight line joining t hese points plotted on linear scales. 
 
When determined in accordance with 7.4 of KS 1884-1, the through-loss deviation, at any frequency, from 
the nominal line shall not exceed the 0.6 dB for FM band and Bands III, IV and V. 
 
5.2 Mutual isolation between outputs 
 
When determined in accordance with 7.5 of KS 1884 -1, the minimum isolation between FM and TV outputs, 
in the frequency range stated by the m anufacturer, shall be not less than 12 dB. 
 
5.3 Return loss 
 When determined in accordance with 7.6 of KS 1884-1, th e return loss, within the frequency range stated by 
the manufacturer, shall not exceed the following: 
 
a) for outlet boxes in subscriber's tap systems: 10 dB; and 
 
b) for outlet boxes in looped systems: 
 
1) input and output: 20 dB at 80 MH z minus 1.5 dB per octave; and 
 
2) FM and TV outlets: 10 dB.  
 
During measurements at the input, the connection s shall be terminated in the following manner: 
 
⎯ TV frequencies: TV outlet terminated; 
FM outlet unterminated and terminated. 
 
⎯ FM frequencies: FM outlet terminated; 
TV outlet unterminated and terminated. 
 
During measurements at the TV outlet, the input shall be terminated, while the FM outlet shall be terminated 
and unterminated.  
During measurements at the FM outlet, the input shall be terminated, while the TV outlet shall be terminated 
and unterminated.  PUBLIC REVIEW DRAFT, OCTOBER 2008KS 1884-1:2008 
© KEBS 2006 — All rights reserved  3 5.4 Continuity between input and output — outer cable terminals 
 
When tested in accordance with 7.8 of KS 1884- 1, the circuit-breaker shall have tripped on each 
performance of 7.8.2.2. On inspection of the tra ck between the terminals, there shall be no sign of 
deterioration caused by the generation of heat. 
 
5.5 Component radiation characteristic 
 
When determined in accordance with 7.7 of KS 1884-1, the minimum value for the component radiation 
characteristic shall be 
 
a) 60 dB in the frequency ra nge 5 MHz to 1 000 MHz, and 
 
b) 37 dB in the frequency range 1 000 MHz to 1 750 MHz. 
 
6 Packing and marking  
 
6.1 Packing 
 
Each outlet box shall be so acceptably packed as to protect it from damage during normal handling, 
transportation and storage.  
6.2 Marking 
 
The outlet box shall be legibly and indelibly marked with the following information: 
 
a) the manufacturer's trade name or trade mark;  
b) the frequency range for which the outlet box has been designed; and 
 
c) identification marks fo r the input and the output. 
 
NOTE In addition, it is advisable to pr int the above information on the packing.